Interactions among aquatic invasive species in lakes: a mesocosm experiment

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Aquatic Invasive Species (AIS): Banded mystery snail (Viviparus georgianus)
Eurasian Watermilfoil (Myriophyllum spicatum)
Rusty crayfish (Orconectes rusticus)
Project Location: Northern Wisconsin
Project Start Date: 05/2014
Expected Timeframe/Duration: 08/2014
Sponsoring Organization: Missouri State University
National Parks Service
UW- Trout Lake Station
Web Links:
Primary Contact: Adrienne Gemberling
Missouri State University

Secondary Contact:
Project Summary:

Nonindigenous species (NIS) have become increasingly common worldwide and are one of the leading causes of biodiversity loss in freshwater. Three widespread NIS in Midwestern lakes are rusty crayfish (Orconectes rusticus, RC), banded mystery snails (Viviparus georgianus, BMS), and Eurasian water-milfoil (Myriophyllum spicatum, EWM), species that commonly co-occur. 

The current study evaluated the impacts and interactions between these three invaders, to determine if their effects on native plant and snail communities were additive, synergistic, or antagonistic. To understand this interaction, a three-factor split plot experiment was conducted to simulate the effects of all possible groupings of invaders. The experiment was conducted during summer 2014 in outdoor tanks (2.1 m3), manipulating the presence or absence of BMS, RC, and EWM.  Response factors of interest included biomass of native and invasive (EWM) plants and native and invasive snails (BMS) by species, concentrations of attached and suspended algae, and nutrient concentrations.